Google Speech To Text API

google_speech2text.md

Google Speech To Text API

Base URL: https://www.google.com/speech-api/v1/recognize
It accepts POST requests with voice file encoded in FLAC format, and query parameters for control.

Query Parameters

client
The client's name you're connecting from. For spoofing purposes, let's use chromium

lang
Speech language, for example, ar-QA for Qatari Arabic, or en-US for U.S. English

maxresults
Maximum results to return for utterance

POST

body
Should contain FLAC formatted voice binary

HTTP Header

Content-Type
Should be audio/x-flac; rate=16000;, where MIME and sample rate of the FLAC file is included

User-Agent
Can be the client's user agent string, for spoofing purposes, we'll use Chrome's

Examples

These examples assume you have a voice file encoded in FLAC called alsalam-alikum.flac.

wget

This will save JSON response in a file called recognized.json

wget --post-file='alsalam-alikum.flac' \
--user-agent='Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7' \
--header='Content-Type: audio/x-flac; rate=16000;' \
-O 'recognized.json' \
'https://www.google.com/speech-api/v1/recognize?client=chromium&lang=ar-QA&maxresults=10'

curl

curl -X POST \
--data-binary @alsalam-alikum.flac \
--user-agent 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7' \
--header 'Content-Type: audio/x-flac; rate=16000;' \
'https://www.google.com/speech-api/v1/recognize?client=chromium&lang=ar-QA&maxresults=10'

I went through the docs for creating key but it gives me forbidden error 403. I had tried a key few weeks ago shared by someone here which had worked but now that also fails. What step am I missing that I get 403 error? Is there any other way. Please help.

Anyone got it working in Java with V2?? I am getting 403 error.
Also looking at the comments looks like it only converts 10 to 15 secs of audio ... Anyway we can extend that time limit to say one minute or even longer??

I changed to use pocketsphinx, it can be works offline and supports Chinese language.

I also have issues with the authentication for Google Speech2Text API on Android.
It works with my API key in WiFi if I tell Google my current IP. But the Android Key isn't working. I provided the correct debug-keystore SHA1 but am receiving: The client does not have permission to get url ... from this server. I use the Apache HttpClient within my Android application. Any ideas?

@ijazsarwar This Google API is not intended to continuously recognize speech. Its for short commands. Thats why there is this few seconds limit. Take a look at my master thesis project where I try to send 15sec chunks to Google to get something continuous-like.

@amd5200 I'd love to talk to you about PocketSphinx on Andoird for generic vocabulary searches since I already tried unsuccessfully to get it to work as described here - you'll find my email in my github profile.

@marfnk I just used it on my single board, like raspberry pi, and for Chinese. ( https://www.youtube.com/watch?v=EucxVToC58E&list=UUgBhkLQyk0LwxpKAmIZQNgA&hd=1 )
I never tried PocketSphinx on Andoird, so i got no idea for this.

IS this possible to use ajax to post in to Google Speech API ?

Hello everybody,

Some time ago I created this shell script which packages everything you need to use the API v2 (record data for a given duration or use a file, specify language, filter out results, etc.): https://github.com/amsehili/gspeech-rec

For more details about the reverse engineering being used, check out this article: https://aminesehili.wordpress.com/2015/02/08/on-the-use-of-googles-speech-recognition-api-version-2/

Cheers!

how to divide audio into frames of 15 sec using java code or command line??

Hi, https://www.google.com/speech-api/v2/recognize -> 400. That’s an error.
I am in Canada

HI, Sending 'POST' request to URL : https://www.google.com/speech-api/v2/recognize?output=json&lang=en-us&key=AIzaSyBOti4mM-6x9WDnZIjIeyEU21OpBXqWBgw&results=6&pfilter=2
Response Code : 200
{"result":[]}

I am getting above code.. But no output of recorded file to be convert in to text. How do I get that ?

Hi everybody,
When I was "POST https://speech.googleapis.com/v1beta1/speech:asyncrecognize".
I receive the error message like this:
{
"code": 403,
"errors": [
{
"domain": "global",
"message": "Requests from this Android client application are blocked.",
"reason": "forbidden"
}
],
"message": "Requests from this Android client application are blocked.",
"status": "PERMISSION_DENIED"
}
Dose any buddy knows how to resolve this problem?
Thanks.

    public static async Task<string> RequestGoogleSpeechAPIAsync(byte[] byteArray) 
    {
        var httpClient = new HttpClient();
        var mediaType = new MediaTypeWithQualityHeaderValue("audio/x-flac");
        var parameter = new NameValueHeaderValue("rate", "16000");
        mediaType.Parameters.Add(parameter);

        var url = "https://www.google.com/speech-api/v2/recognize?output=json&lang=en-US&key=";
        var appSettings = ConfigurationManager.AppSettings;
        var apiKey = "AIzaSyBOti4mM-6x9WDnZIjIeyEU21OpBXqWBgw";
        var uri = new Uri(url + apiKey);

        using (MemoryStream ms = new MemoryStream(byteArray, 0, byteArray.Length))
        {
            var param = new StreamContent(ms);
            param.Headers.ContentType = mediaType;

            var result = await httpClient.PostAsync(uri, param);

            var responseFromServer = await result.Content.ReadAsStringAsync();
            var responseArray = responseFromServer.Split('\n');
            var responseJson = await Task.Factory.StartNew(() => JsonConvert.DeserializeObject<SpajamHonsen.Models.GoogleSpeechAPIResponseModel.Resuls>(responceArray[1]));

            return responseJson.result[0].alternative[0].transcript;
        }
    }

@akifnaeem21
Request you to please share speech to text c# code.

i can't run :(
result is blank, tell me why, plz

Here is the updated Api : https://cloud.google.com/speech-to-text/docs/reference/rest/v1/speech/recognize

Stackoverflow Ref : https://stackoverflow.com/questions/50760057/how-to-use-googles-cloud-speech-to-text-rest-api-to-transcribe-a-video